Abstract:Low data rate, reliable wireless connectivity among inexpensive fixed, portable and mobile devices is needed in some home automation, industrial control, medical sensing, and reality applications. Such applications are the subject of the IEEE 802.15.4 Standard, and require low power, yet reliable data transfer, but have reduced requirements on data rate and throughput. Multihop relaying systems employing time diversity are proposed for these applications. The performance of repetition-based relaying with amplify-and-forward (AF) and decode-and-forward (DF) protocols operating in Rayleigh fading is studied. Analytical expressions for the symbol error probability (SEP) of the system are derived for both AF and DF relaying protocols. The repetition-based multihop transmission systems achieve diversity order equal to the number of repetitions with AF and DF relaying. It is shown that repetition-based DF relaying systems achieve better SEP than repetition-based AF relaying systems for medium to large values of signal-to-noise ratio.